A precise measurement of the cosmic microwave background radiation temperature from CN observations toward Zeta Persei

Details A precise measurement of the cosmic microwave background radiation temperature from CN observations toward Zeta Persei A precise measurement of the cosmic microwave background radiation temperature from CN observations toward Zeta Persei

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...356l...1k&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 356, June 10, 1990, p. L1-L4.

Astronomy and Astrophysics

Astrophysics

25

Big Bang Cosmology, Cyano Compounds, Interstellar Gas, Relic Radiation, Signal To Noise Ratios, Black Body Radiation, High Resolution, Light (Visible Radiation), Line Of Sight

Scientific paper

High-SNR high-resolution (R = 150,000-170,000) optical spectra of interstellar CN toward Zeta Per are presented. Fits to the data yield a value of 1.25 + or - 0.02 km/s for the R(O) linewidth parameter b along this line of sight. The column densities of the level populations are directly determined from the convolution of the instrument response function with a model which is then fitted to the data. Tex = 2.79 + or - 0.03 K is obtained along this line of sight.

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